Furnace.



PATENTBD AUG. 16, 1904.

. E. WALSH.

FURNACE.

APPLIoATIoN FILED APR. 5, 1904.

N0 MODEL.

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o/O/o/ oo oo oooo Patented August 16, 1904.

UNITED STATES PATENT OFFICE.

l/VILLIAM E. WALSH, OF MORRIS, ILLINOIS.

FURNACE.

l SPECIFICATION forming part of Letters Patent No. 767,783, dated August 16, 1904.

Application iiled April 5, 1904. Serial No. 201,713. (No model.)

To all whom t may concern:

Be it known that I, vWILLIAM E. WALSH, a citizen of the United States, residing at Morris, in the county of Grundy and State of Illinois,have invented certain new and useful Iniprovements in Furnaces, of which the following is a specification.

The object of this invention is to construct a furnace in which the walls of the furnace are so constructed and arranged that streams of heated air will be distributed over the grate at the most advantageous points to effect the combustion; and the invention more particularly relates to the construction of passages and heating-chambers for heating the air prior to its discharge and to the means employed for injecting a jet of steam to commingle with the air and create a suction at the proper point for more evenly and uniformly discharging the air over the grate-surface.

A further object of the invention is to so construct the walls that they will provide the greatestvpossible amount of heating' or radiating surface for the air, thereby utilizing the heat of the fuel to the greatest possible eX- tent. y

The invention consists in the features of con`- struction and combination of parts hereinafter described and claimed.

. and Fig. 5 an enlarged detail of one of the fins or plates for increasing the radiation of the furnace-walls.

For purposes of illustration the present invention is applied to a furnace ofthe ordinary type, having a boiler A provided with lues a and an escape-nue a', as usual, and said boiler is inclosed with a furnace having side walls B, each of the side walls having near its base a longitudinally-extending interior passage I), which opens at the front end of the furnace and terminates in a chamber C at the rear end of the furnace, one chamber being provided for each of the passages, and the two chambers O are separated by means of a vertical wall 0, which bridges the space between an interior rear wall c and an exterior wall c2. Each of the chambers C is provided with an abutment D, having at its lower end a short longitudinal wall (Z, and said abutment likewise abridges the space between the interior and exterior rear walls, forming passages d', leading from the end of the longitudinal passages Z), so that air entering the chamber O will pass up over the' abutment and down, as indicated by the arrows. At the bottom of the chamber are a series of longitudinally-extending pipes E, which open into the chamber and lead therefrom to a bridgewall e, having on its interior a chamber e', which chamber is provided near its top with a transversely-extending series of openings e2, adapted to forwardly project air over a grate e3, which extends between the bridge-wall and the front wall e4 of the furnace.

Each of the side walls of the furnace is provided on its interior with a heating-chamber F, communicating with the longitudinally-extending passage by means of an opening' f, and said heating-chamber is provided with a transversely-extending abutment f', leaving an opening f2 thereover for the passage of air in the forward part of the heating-chamber.

rIhe heating-chamber is provided in its forward portion with a series of inwardly-cxtending openings f3, adapted to discharge air laterally from both sides immediately above the grate. In order to increase the radiating capacity of the heating-chamber, the inner walls j4 thereof are provided with a series of metal fins or plates f, which are preferably provided with perforations f, as shown in, Fig. 5, and said fins or plates are positioned within the wall to have their outer edges lie in from o r flush with the face of the wall and their inner edges project into the interior of the chamber, so that the heat created by the combustion will be more quickly and easily transferred to the heating-chambers owing to the superior conductivity of the metal ns or plates.

Within the heating-chambers are located pipes G, each pipe having' an enlarged for- IOO g in line with the holes f3.

wardly-projecting mouth g, and said pipes pass along the front of the abutment f and thence forwardly in line with the openingsj, and the discharge end of each of the pipes is provided with a series of discharge-openings Steam or compressed-air pipes H are located in line with the mouths of the pipes G to project jets of steam or air thereinto for increasing the combustion and creating a suction into the pipes G for drawing the air into the heatingchamber and over the abutment therein. Each of the pipes has entered thereinto a transversely-extending pipe 7i, which enters the chamber e in the bridge-wall, and said transversely-extending pipes are provided with discharge-openings h2 in line with the openings e2 for projecting a combined stream of hot air and steam forwardly over the grate. The transverselyextending pipes are closed at their inner ends, so that either can be worked independently of the other, thereby enabling the operation of one side only or of both sides of the furnace.

In use air will enter the forward end of the furnace and pass along the longitudinally-extending passages b, and a portion of the air will be discharged at the end of the passages into the chambers C at the rear end of the furnace, the walls of which chambers will be heated by the passage of the products of combustion as they enter the flues in the rear end of a boiler. The air after being' heated within said chambers will be carried by the pipes E into the interior of thebridge-wall, at which point it will be further heated prior to its discharge forwardly over the grate of the furnace.

A portion of the air will be taken from the passages b and carried up into the heatingchambers within the side walls of the furnace and over the abutments therein, which arrangement causes the air to be highly heated prior to its discharge through the side openings on both sides of the grate in front of the bridge-wall. By injecting' a jet of steam or compressed air a portion of the air will be drawn into the pipes G, creating a suction which tends to draw the air up into the heating-chambers to enter the mouth of the pipe and likewise tends to project more perfectly the heated air through the openings f3.

The jet of steam can be increased or decreased to regulate the suction and draft of the furnace on either or both sides thereof, thereby increasing or decreasing the amount of air drawn up into the heating-chambers in the side walls and projected therefrom.

It will be seen from the foregoing description that the arrangement of pipes and passages of the present invention is one which provides for the thorough heating and discharge of air at the most advantageous points and that the heating-chambers are located in such a way as to utilize to its fullest extent heat What I claim as new, and desire to secure I by Letters Patent, is-- l. In a furnace, the combination of side walls provided with heating-chambers on their interior, longitudinally-extending passages in the side walls communicating with the heating-chambers and leading' to a chamber in the rear of the furnace, discharge-openings in the interior side walls of the furnace located adjacent to the furnace-grate, abridge-wallprovided with discharge-openings adapted to project air forwardly over the grate, an air-passage leading from the chamber in the rear of the furnace and communicating with the discharge-openings in the bridge-Wall, abutments in the heating-chambers lin the side walls an abutment in the chamber at the rear of the'furnace over which abutments the currents of air are compelled to pass prior to their discharge, a pipe in each of the chambers in the side walls having discharge-openings in li'ne with the discharge-openings in the side walls, a steam-pipe adapted to inject jets of steam into said pipes to create a suction of air into the pipes, and transversely-extending pipesV in the bridgewall connected with the first-mentioned pipes and provided with discharge-openings in line with the dischargeopenings in the bridgewall, substantially as described.

2. In a furnace, the combination of side walls provided with longitudinally-extending passages opening through the front of the furnace, and further provided with heating-chambers in communication with the passages, discharge-openings from the heating-chambers adapted to discharge air laterally over the grate of the furnace, two separated chambers in the rea'r` of the furnace into which the longitudinally-extending passages open, abutments in the two side heating-chambers, abutments in the chambers at the rear of the furnace over which abutments the currents of air are compelled to pass, a bridge-wall provided on its interior with a chamber and provided With discharge-openings adapted to discharge air forwardly over the grate, and passages leading from the chamber in the rear of the furnace and communicating with the discharge-opening's in the bridge-wall, a pipe in each of the heating-chambers in the side Walls provided with discharge-openings in line with the discharge openings of said chambers, transversely-extending pipes in the bridgewall communicating with thefirst-mentioned pipes and having discharge-openings in line with the discharge-openings in the bridgewall and steam-pipes adapted to discharge jets IOO IIO

of steam into the first-mentioned pipes to create a suction thereinto, substantially as described.

3. In a furnace, the combination of side walls provided with longitudinally-extending passages opening through the front of the furnace and further provided with heating-chambers in communication with the passages, and discharge-openings from the heating-chambers adapted to discharge air laterally over the grate of the furnace, a bridge-wall provided with discharge-openings adapted to discharge forwardly over the grate of the furnace, a chamber at the rear of the furnace communicating with the longitudinally-extending passages, and a passage from the rear chamber communicating with the openings in the bridge-wall, substantially as described.

4. In a furnace, the combination of side walls provided with longitudinally-extending passages opening through the front of the furnace and further provided with heating-chambers in communication with the passages, discharge-openings from the heating-chambers adapted to discharge air laterally over the grate of the furnace, two separated chambers in the rear of the furnace into which the longitudinally-extending passages open, a bridgewall provided on its interior with a chamber and provided with discharge-openings adapted to discharge forwardly over the grate, and air-passages leading from the chambers in the rear of the furnace and communicating with the discharge-openings in the bridge-wall, substantially as described.

5. 1n a furnace, the combination of side walls provided with longitudinally-extending passages open at one end to receive air thereinto, heating-chambers in the side walls in communication with the passages, dischargeopenings from the heating-chambers adapted todischarge air laterally over the grate of the furnace, two separated chambers in the rear of the furnace into which the longitudinallyextending passages open, abutments in the two side heating-chambers, abutments in the chambers at the rear of the furnace over which abutments the currents of air are compelled to pass, a bridge-wall provided on its interior with a chamber and provided with dischargeopenings adapted to discharge air forwardly over the grate, and air-passages leading from the chambers in the rear of the furnace and communicating with the discharge-openings in the bridge-wall, substantially as described.

6. In a furnace, the combination of side walls provided with longitudinally-extending passages openv at one end to receive air thereinto, heating-chambers in the side walls in communication with the passages, dischargeopenings from the heating-chambers adapted to discharge air laterally over the grate of the furnace, two separated chambers in the rear of the furnace into which the longitudinallyextending passages open, abutments in the two side heating-chambers, abutments in the chambers at the rear of the furnacey over which abutments the currents of air are compelled to pass, a bridge-wall provided on its interior with a chamber and provided with dischargeopenings adapted to discharge air forwardly over the grate, air-passages leading from the chambers in the rear of the furnace and communicating with the discharge-openings in the bridge-wall, a pipe in each of the side heating-chambers provided with discharge-openings in line with the discharge-openings of such chambers, and steam-pipes adapted to discharge jets of steam in the first-mentioned pipes to create a suction thereinto, substantially as described.

7. In a furnace, the combination of side walls provided with longitudinally-extending passages opening through the front of the furnace, two separated chambers at the rear of the furnace into which the longitudinally-extending passages open, abutments in the chambers in the rear of the furnace over which the currents of air are compelled to pass, a bridgewall provided on its interior with a chamber and provided with discharge-openings adapted to discharge air forwardly over the grate, and air-passages leading from the chambers in the rear of the furnace and communicating with the discharge-openings in the bridgewall, substantially as described.

WILLIAM E. WALSH.

Witnesses:

OSCAR W. BOND, SAMUEL W. ABANNINGl 

